Core-oven.



Patented Nov. 20, |900. T. I. RANKIN.

C0 R E 0V EN.

(Application ledtJan. 8, V19170.!

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f I x GHS n ...N @N A! lil No. 662,303. Patented Nov. 20, i900. T. I.BANKIN.

CRE OVEN.

(Application filed Jn. s, moa.)

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Ilnrrnn @raras PATENT, Ormea THOMAS I. RANKIN, OF PHILADELPHIA,PENNSYLVANIA, ASSIGNOR 'lO THE ABRAM COX STOVE COMPANY, OF SAME PLACE.

CORE-OVEN.

SPECIFICATION forming part of Letters Patent No. 662,303, dated November20, 1900.

Application filed January 8, 1900. Serial No. 722. KNO modela Z u/ whomit' may concern-f;

Be it known that I, THOMAS I. RANKIN, a citizen of the United States,residing in Philadelphia, Pennsylvania, have invented certainImprovements in Core-Ovens, of which the following is a specification.

My invention relates to certain improvements in ovens for baking coresused in making castings.

One object of myinvention is to so construct the oven that it willevenly and thoroughly bake the cores; and a further object of theinvention is to make the oven continuous, so that the core-carriages canenter the oven at one end and after the cores are baked the carriagescan be removed at the opposite end of the oven, as fully describedhereinafter'.

In the accompanying drawings, Figure lA is a longitudinal sectional viewof my improved core-oven. Fig. 2 is a sectional plan view. Fig. 3 is anend view. Fig. 4 is a section on the line 4 4, Fig. l. Fig. 5 is anenlarged section on the line 5 5, Fig. l. Fig. 6 is an enlargedsectional view of the front end of the z5 furnace; and Fig. 7 is asectional View on the line 7 7, Fig. 6.

A is the oven, which is of su'cient width and height to accommodate thecorecars F. (Shown in outline in Fig. 7.) Extending through the oven isa track the rails Ct a of which are in the form of I-beams and aresupported on suitable foundations. The rails extend beyond each end ofthe oven, and crossrails et are provided at the frontof the furnace, andcross-rails a? are pro vided at the rear ofthe furnace. At a point wherethese rails cross the oven-rails a a I provide a turn-table a3, so thatthe core-cars can be shifted from the crossrails to the oven-rails, andwhen the cores are baked they can be shifted from the oven rails to theother cross rails. The cross-rails connect with rails throughout thefoundry.

Directly under the front of the oven is a firechamber B, communicatingthrough a flue b with the oven A. The flue enters the oven near theforward end and between the rails.

B' is the ash-pit, and b is the grate.

VSituated under the center of the oven is a return-due D, communicatingwith the oven through a passage d at the rear of the furnace andcommunicating near the forward end of the furnace with the stack D. Adamper d', consisting of a plate movable horizontally and constructed togive varying degrees of opening to the return-line, is provided at therear of the furnace at the point in the floor where said ue communicateswith the oven. This damper can be operated without opening the oven. Imake the portion be- 6o tween the oven and the return-flue of lightmaterial, preferably sheet-iron, as shown in Fig. 5, so that theheatofthe products of combustion passing through the return-fine will tend toheat the floor of the oven. The sheetiron floor c is preferably curvedand rests upon the base-liange of the I-beams, as shown in Fig. 5

.E E are doors hinged to the oven structure and arranged so as-to openwide to allow the 7o core-cars F to enter or leave the oven.. Thecore-cars F are mounted on suitable wheels ff and carry the core-platesf', on which the cores are placed. These plates, as wellas the ears, areperforated,so as to allow theproducts of combustion to bake all portionsof the core.

The core-cars are coupled together by any suitable means and aretraversed through the furnace by an endless driving-chain t', whichpasses around the driving-wheel I at one end 8o of the furnace and awheel I at the opposite end of the furnace. Either one or both of thesewheels may be the driving-wheel, and I preferably gear the shaft of thedrivingwheel to a handshaft by a gear and pinion, Fig. 7, so that thewheel can be more readily turned. The chain is connected to the severalcars by links t", so that the cars can be drawn through the oven withoutopening the doors, except to insert or remove a car and without 9o theoperator entering the oven.

I preferably arrange the iioors or the rails `on which the cars travelon a slight A incline from the forward end to the rear, so that the carscan be more readily traversed through the oven. In fact, the incline issuch that the chain to which the cars are attached is under tension atall times and the operator simply releases the chain to allow the carsto move forward by their own weight. It Ioo 'may be necessary in someinstances to hold the cars, which can 'be done by locking thehand-Wheel.

By placing the fire-chamber in such position that it will communicatewith the forward end of the oven I am enabled to place the car as itenters the oven immediately over the flue b, which is the hottest pointin the oven. Thus a crust is immediately baked upon the entire surfaceof the core, preventing shrinkage to any great extent and holding thecore intact during the further movement of the core-car through thefurnace.

As the core-cars are moved forward they are subjected to sufiicient heatto thoroughly bake each of the cores, and when the corecars are removedfrom the furnace the cores are browned evenly, and I have found thateach core has been thoroughly baked. The return-fine adds materially tothe heat of the oven.

While I have shown cars for supporting the cores, the cores may besupported on slides or other carriers which can be tra versed throughthel oven.

I claim as my invention- The combination in a core-oven, of a longchamber, a track extending therethrough, doors at each end of thechamber, a furnace directly under the forward end of the chamber, landcommunicating` directly with the chamber between the rails of .the trackthrough a flue, a return-flue directly under the center of the chamber,between the rails of the track, and communicating with the rear of thechamber, and With a stack situated near the forward end of the chamber,and a curved partition between the returnflue and the chamber-being thinso that the floor of the chamber will be heated by the return prod nctsof combustion, substantially as described.

In testimony whereof I have 'signed my name to this specification in thepresence of two subscribing witnesses.

THOMAS I. RANKIN.

Witnesses:

WILL. A. BARR, Jos. H. KLEIN.

